*{
    margin: 0;
    padding: 0;
}
a {
    text-decoration: none;
}
li,ol,dl {
    list-style: none;
}
body {
    color: #212529;
    font-size: 14px;
}
/* 左边导航栏 */
.nav {
    width: 336px;
    float: left;
    /* background: pink; */
}
.nav h2 {
    line-height: 48px;
    padding-left: 24px;
}
.nav h2 a {
    color: #212529;
    font-size: 16px;
}
.nav h2 a:nth-child(1) {
    margin-right: 8px;
}
hr{
    width: 300px;
    height: 1px;
    margin: 10px 0;
    margin-top: 0;
    border: 0;
    background-color: #e6e6e6;
    margin-left: 24px;
    box-sizing: border-box;
}
.nav ul {
    padding-left: 24px;
}
.nav li {
    padding: 10px 0;
}
.nav li a {
    font-size: 14px;
    color: #212529;
}
.nav li a:hover {
    color: greenyellow;
}
.nav li span {
    margin-right: 5px;
}
/* 右边内容部分 */
.content {
    width: 877px;
    /* background: palegreen; */
    float: left;
    text-align: center;
    padding-top: 120px;
    box-sizing: border-box;
}
.content>img {
    width: 200px;
}
.author {
    margin-top: 50px;
    margin-bottom: 20px;
}
.author a {
    color: #34495e;
}
.author img {
    width: 32px;
    height: 32px;
    vertical-align: middle;
    border-radius: 50%;
}
h3 {
    font-size: 28px;
    color: #3a5169;
    margin: 20px 0;
}
.content p {
    color: #666;
}
.content span {
    color: #34495e;
}
.visible {
    margin-top: 48px;
    margin-bottom: 200px;
    font-size: 12px;
    color: #8c8c8c;
}
.visible b {
    margin-right: 40px;
    font-style: normal;
}
.footer p a {
    font-size: 12px;
    color: #999;
}
.footer p span {
    color: #999;
    height: 12px;
    padding: 0 10px;
}
.footer p:nth-child(1) {
    margin-bottom: 10px;
}
.footer p {
    font-size: 12px;
    color: #999;
}